Cloudflare blocking uploads with some file extensions

[fritex]

@ekrem

when i am trying to upload files from this endpoint adress https://app.name.com/api/v1/file/upload

May I ask if you’re uploading via API request for that particular endpoint like via some terminal or like curl, or rather manually via some kind of an dashboard/interface in your Web browser when you open it?

Regarding the 403 error you’re experiencing, may I ask what kind of troubleshooting steps have you tried so far from an article below?

Community Tip - Fixing Error 403 Forbidden

Error Try the suggestions in this Community Tip to help you fix Error 403 Forbidden. Background A 403 Forbidden Error is a client side error that means that the client sent something the origin was unable to process. With the exception of requests that violate WAF rules or subdomains that are not covered by a certificate, Cloudflare does not generate any 4xx errors, so this would indicate something is not configured correctly with your hosting provider or your client is sending something inco…

You could determine if the 403 is caused by Cloudflare by using “Pause” option as follows:

1. Use the “Pause Cloudflare on Site” option from the Overview tab for your domain at dash.cloudflare.com .
2. The link is in the lower right corner of that page.
3. Give it five minutes to take effect, then make sure site is working as expected with HTTPS.

Furthermore, I wonder if any of Cloudflare security & protection settings like Bot Fight Mode or Browser Integrity Check challenged or blocked the request
If yes, then if you navigate to the Cloudflare dashboard → Security → Overview and lookup for Firewall events for the past 24hours or so. Once you find them, click on a particular one to find more details about it (user-agent, IP, HTTP version …).